Search Publications
Cosmological Constraints from Galaxy Clusters in the 2500 Square-degree SPT-SZ Survey
Gladders, M. D.; Schrabback, T.; Rest, A. +74 more
We present cosmological parameter constraints obtained from galaxy clusters identified by their Sunyaev-Zel’dovich effect signature in the 2500 square-degree South Pole Telescope Sunyaev Zel’dovich (SPT-SZ) survey. We consider the 377 cluster candidates identified at z\gt 0.25 with a detection significance greater than five, corresponding to the 9…
Where Stars Form: Inside-out Growth and Coherent Star Formation from HST Hα Maps of 3200 Galaxies across the Main Sequence at 0.7 < z < 1.5
van den Bosch, Frank C.; van Dokkum, Pieter G.; Franx, Marijn +18 more
We present Hα maps at 1 kpc spatial resolution for star-forming galaxies at z ∼ 1, made possible by the Wide Field Camera 3 grism on Hubble Space Telescope (HST). Employing this capability over all five 3D-HST/CANDELS fields provides a sample of 3200 galaxies enabling a division into subsamples based on stellar mass and star formation rate (SFR). …
The Optical-infrared Extinction Curve and Its Variation in the Milky Way
Peek, J. E. G.; Rix, H. -W.; Chambers, K. C. +19 more
The dust extinction curve is a critical component of many observational programs and an important diagnostic of the physics of the interstellar medium. Here we present new measurements of the dust extinction curve and its variation toward tens of thousands of stars, a hundred-fold larger sample than in existing detailed studies. We use data from t…
The MUSCLES Treasury Survey. II. Intrinsic LYα and Extreme Ultraviolet Spectra of K and M Dwarfs with Exoplanets*
Loyd, R. O. Parke; Redfield, Seth; Brown, Alexander +9 more
The ultraviolet (UV) spectral energy distributions (SEDs) of low-mass (K- and M-type) stars play a critical role in the heating and chemistry of exoplanet atmospheres, but are not observationally well-constrained. Direct observations of the intrinsic flux of the Lyα line (the dominant source of UV photons from low-mass stars) are challenging, as i…
Quantifying Discordance in the 2015 Planck CMB Spectrum
Huang, Y.; Halpern, M.; Weiland, J. L. +4 more
We examine the internal consistency of the Planck 2015 cosmic microwave background (CMB) temperature anisotropy power spectrum. We show that tension exists between cosmological constant cold dark matter ({{Λ }}{CDM}) model parameters inferred from multipoles {\ell }\lt 1000 (roughly those accessible to Wilkinson Microwave Anisotropy Probe), and fr…
ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Survey Description
Carilli, Chris; Ivison, R. J.; Bell, Eric F. +39 more
We present the rationale for and the observational description of ASPECS: the ALMA SPECtroscopic Survey in the Hubble Ultra-Deep Field (UDF), the cosmological deep field that has the deepest multi-wavelength data available. Our overarching goal is to obtain an unbiased census of molecular gas and dust continuum emission in high-redshift (z > 0.…
CLASH: Joint Analysis of Strong-lensing, Weak-lensing Shear, and Magnification Data for 20 Galaxy Clusters
Donahue, Megan; Zitrin, Adi; Umetsu, Keiichi +3 more
We present a comprehensive analysis of strong-lensing, weak-lensing shear and magnification data for a sample of 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19≲ z≲ 0.69 selected from Cluster Lensing And Supernova survey with Hubble (CLASH). Our analysis combines constraints from 16-band Hubble Space Telescope observations and wi…
The FourStar Galaxy Evolution Survey (ZFOURGE): Ultraviolet to Far-infrared Catalogs, Medium-bandwidth Photometric Redshifts with Improved Accuracy, Stellar Masses, and Confirmation of Quiescent Galaxies to z ∼ 3.5
Papovich, Casey; Kelson, Daniel D.; Kacprzak, Glenn G. +26 more
The FourStar galaxy evolution survey (ZFOURGE) is a 45 night legacy program with the FourStar near-infrared camera on Magellan and one of the most sensitive surveys to date. ZFOURGE covers a total of 400 arcmin2 in cosmic fields CDFS, COSMOS and UDS, overlapping CANDELS. We present photometric catalogs comprising >70,000 galaxies, se…
The Tight Relation between X-Ray and Ultraviolet Luminosity of Quasars
Lusso, E.; Risaliti, G.
The observed relation between the soft X-ray and the optical-ultraviolet emission in active galactic nuclei (AGNs) is nonlinear and it is usually parametrized as a dependence between the logarithm of the monochromatic luminosity at 2500 Å and at 2 keV. Previous investigations have found that the dispersion of this relation is rather high (∼0.35-0.…
Discovery of a Galaxy Cluster with a Violently Starbursting Core at z = 2.506
Daddi, Emanuele; Tan, Qinghua; Liu, Daizhong +17 more
We report the discovery of a remarkable concentration of massive galaxies with extended X-ray emission at z spec = 2.506, which contains 11 massive (M * ≳ 1011 M ⊙) galaxies in the central 80 kpc region (11.6σ overdensity). We have spectroscopically confirmed 17 member galaxies with 11 from CO and the re…